Preface

Computational Fluid Dynamics (CFD) is a rapidly evolving field that has seen remarkable growth in recent years. The application of numerical methods and algorithms to study fluid flow has revolutionized our understanding of many phenomena in fluid mechanics, such as turbulence, multiphase flow, and heat transfer, thermal reactions. As such, CFD has become an essential tool for engineers, physicists, and researchers in various fields.

CFD simulation is a transdisciplinary technique across fluid mechanics, mathematical algorithms, and computer science that offers a cost-effective alternative to experimental tests. It can accurately reproduce real-world flow phenomena, capture key information for analysis, and has a wide range of applications in fields such as mechanical engineering, chemical engineering, environmental engineering, and thermal engineering. With the aid of high-performance computers, CFD has made significant progress in recent decades, allowing for even greater accuracy and efficiency in solving practical problems.

This edited book, *Computational Fluid Dynamics – Recent Advances, New Perspectives and Applications*, presents a collection of articles that showcase the latest developments in CFD. The book covers a wide range of topics, from the fundamental principles of fluid mechanics and numerical methods to advanced applications in various engineering and scientific fields. The chapters are contributed by leading experts from academia, industry, and research institutions, providing a comprehensive overview of the current state of the art in CFD. The book is composed of seven chapters. Chapter 1, "The Basic Theory of CFD Governing Equations and the Numerical Solution Methods for Reactive Flows", provides an introduction to the basics of CFD, including governing equations and numerical methods, with a focus on reactive flows. Chapter 2, "Hyperbolic Navier-Stokes with Reconstructed Discontinuous Galerkin Method", presents the Galerkin method as an attractive and viable option for discretizing governing equations. Chapter 3, "Computational Fluid Dynamics for Advanced Characterisation of Bioreactors Used in the Biopharmaceutical Industry – Part I: Literature Review," reviews the use of CFD for process characterisation and determining process engineering parameters in the biopharmaceutical industry. Chapter 4, "Computational Fluid Dynamics for Advanced Characterisation of Bioreactors Used in the Biopharmaceutical Industry – Part II: Case Studies," presents case studies that demonstrate how CFD can be used to determine the process characterization of mechanically driven bioreactors in the biopharmaceutical industry and validate the results experimentally. In Chapter 5, "The Effect of Al2O3 Concentration in Annular Fuels for a Typical VVER-1000 Core", the effect of Al2O3 with varying volume percentages in annular fuels for a typical VVER-1000 core is investigated using a CFD modeling approach. Chapter 6, "CFD Application in Ground Source Heat Pump System", discusses the use of CFD to predict the heat transfer characteristics of the ground heat exchanger (GHE), a critical component of ground source heat pump (GSHP) systems. Finally, Chapter 7, "Application of CFD to Prediction of

Heat Exchanger Temperature and Indoor Airflow Control Simulation in Room Air Conditioner Development", describes two CFD models used to investigate the performance of room air conditioners in detail, focusing on the fin-and-tube heat exchanger and the operation of the fan.

Although the different applications involved are interdisciplinary in nature, there is a common need to identify the distribution of fluid dynamic parameters, such as velocity distribution, pressure distribution, temperature distribution, and detect their effects. The advances described by the participating authors have greatly contributed towards this goal. During the preparation of this book, all the participating authors spent significant efforts in composing the chapters with their extraordinary knowledge and high motivation and performed serious revisions where needed. The publication of this book would not have been possible without their ongoing support. The time that they have taken away from their busy schedules to contribute to this book was valuable and greatly appreciated. Also, we are thankful to Mr. Dominik Samardzija, Ms. Jasna Bozic, and Ms. Lucija Tomicic at IntechOpen who helped us throughout every step of the publishing process.

We hope that this book will be a valuable resource for students, researchers, and practitioners interested in the latest developments in CFD. We would like to thank all the contributors for their excellent work and commitment to this project, as well as the publishers for their support in bringing this book to fruition.

> **Guozhao Ji** Dalian University of Technology, Dalian, People's Republic of China

> > **Jingliang Dong** Victoria University, Melbourne, Australia

Section 1

Theory of Computational

Fluid Dynamics

Section 1
